Jamieson Range West Musgraves ppm thorium grid geodeticg

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.This radiometric thorium grid has a cell size of 0.00083 degrees (approximately 88m) and shows thorium element concentration of the Jamieson Range-West Musgrave merge, 1998-2002 in units of parts per million (or ppm). The data used to produce this grid was acquired in 1998 by the WA Government, and consisted of 59784 line-kilometres of data at a line spacing between 200m and 400m, and 60m terrain clearance.

放射性测量法（radiometric method），又称伽马射线能谱法（gamma-ray spectrometric method），通过探测地球表面附近的伽马射线自然变化，表征钾（K）、铀（U）与钍（Th）的天然放射性衰变所产生的辐射信号。所采集的数据将通过标准流程处理，以确保记录的响应仅源自地下岩石。最终生成的数据集可通过解译揭示地下地质构造特征。经处理的数据将由GA地球物理学家开展质量核验，确保GA发布的最终数据满足使用需求。本次发布的放射性钍元素网格数据，单元尺寸为0.00083度（约88米），展示了1998-2002年贾米森岭-西马斯格雷夫合并区域的钍元素浓度分布，单位为百万分率（ppm）。用于生成该网格的数据由西澳大利亚州政府（WA Government）于1998年采集完成，共包含59784测线公里的观测数据，测线间距介于200米至400米之间，飞行离地高度为60米。